Toothbrush



Oct. 15, 1935. FKM. JAHN 2,017,660

TOOTHBRUSH Filed Feb. 2, 1935 INVENTOR Patented Oct. 15, 1935 UNITED STATES PATENT orriss 1 Claim.

This invention relates to brushes, and more particularly to tooth brushes, and has for an object to provide a tooth brush or the like, the brush head of which is removable and reversible 5 upon the handle 'to insure uniform wear.

A further object of the invention is to provide a brush head and handle having tongue and groove interconnection, said parts being so arranged that the head may be reversed relative to the handle while still employing the same tongue and groove connection.

A further object of the invention is to provide a brush head and handle having dovetailed interconnection so proportioned that the head may be reversed relative to the handle.

The invention, therefore, comprises a handle and brush head, one part of which is provided with one or more grooves, the other part being provided with one or more tongues, properly proportioned and contoured to coast so that the brush head may be positioned upon the handle reversibly.

In the drawing:

Figure 1 is a view in perspective of one embodiment of the present invention, and

Figure 2 is a plan view of the brush head entering into the combination shown at Figure 1.

Like characters of reference indicate corresponding parts throughout the several views.

While the present invention takes a single specific form as disclosed in the drawing, it is to be understood that the inventive principle involved, is that of particularly providing a brush and handle which are interconnected in such manner that the head may be removed from the handle and reversed as often as may be desired, and to remain fixedly in position when applied.

It is well-known that in the use of brushes and particularly such brushes as tooth brushes, the wear is applied unevenly so that the wear upon the bristles is not uniform.

By providing means whereby the brush head may be reversed, the wear may be equalized so that the bristles will wear uniformly and thereby lengthen the life of the brush.

At Figure 1 an elongated handle member is shown at E5 and this member I5 is formed at one end with a series of transversely arranged equal-sized and equally-spaced dove-tailed tongues 22.

At Figure 2 a brush headlfi is provided with a series of transversely arranged ribs 2! which correspond to the tongues 22 in the handle 15. These ribs 21 are arranged in a series throughout the entire extent of the brush head It}, as 10 shown in the drawing, and a passageway I4 extends lengthwise through the several ribs H, and this passageway I4 is equidistantly spaced from the sides of the brush head. This passageway is shown in dotted lines in this figure of the 15 drawing.

The handle I5 is provided with a passageway similar to the passageway Id which extends across the dove-tailed tongue 22 and when the parts Ill and I5 are assembled, the passageway in the respective members are in alignment. A locking pin I4 is positioned in the aligned passageways to maintain the parts assembled.

Of course the tooth brush herein set forth may 25 be modified and changed in various ways without departing from the invention herein illustrated and hereafter claimed.

I claim:-

A tooth brush comprising an elongated unitary handle member having adjacent one end a series of transversely arranged, equal-sized and equally spaced dove-tailed tongues, an elongated brush head having corresponding tongues and grooves provided transversely of the entire extent of the elongated brush head, the handle and brush members each being formed with a passageway extending length-Wise thereof through said tongues and being equidistantly spaced from the sides of the brush and handle members, said passage- 0 ways being aligned when the handle and brush members are assembled, and a locking pin in said aligned passageways.

FRANCIS M. JAHN. 

